Thermoplastic Membranes Incorporating Semiconductive Metal–Organic Frameworks: An Advance on Flexible X-ray Detectors

Chengyu Liang, Shitong Zhang, Liwei Cheng, Jian Xie, Fuwan Zhai, Yihui He, Yaxing Wang*, Zhifang Chai, Shuao Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Semiconductive metal–organic frameworks (MOFs) have emerged in applications such as chemical sensors, electrocatalysts, energy storage materials, and electronic devices. However, examples of semiconductive MOFs within flexible electronics have not been reported. We present flexible X-ray detectors prepared by thermoplastic dispersal of a semiconductive MOF (SCU-13) through a commercially available polymer, poly(vinylidene fluoride). The flexible detectors exhibit efficient X-ray-to-electric current conversion with enhanced charge-carrier mobility and low trap density compared to pelleted devices. A high X-ray detection sensitivity of 65.86 μCGyair−1 cm−2 was achieved, which outperforms other pelleted devices and commercial flexible X-ray detectors. We demonstrate that the MOF-based flexible detectors can be operated at multiple bending angles without a deterioration in detection performance. As a proof-of-concept, an X-ray phase contrast under bending conditions was constructed using a 5×5 pixelated MOF-based imager.

Original languageEnglish (US)
Pages (from-to)11856-11860
Number of pages5
JournalAngewandte Chemie - International Edition
Volume59
Issue number29
DOIs
StatePublished - Jul 13 2020

Keywords

  • charge transport
  • flexible materials
  • metal–organic frameworks
  • mixed matrix membranes
  • semiconductors

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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